JPH1079911A - Reproducing device for video signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To necessitate only a camera unit in one format even for normal television recording and slow motion recording by providing a device for switching a frame frequency at a camera unit. SOLUTION: Two camera units 14 and 15 can be switched from a 50Hz normal frame frequency to a 150Hz increased frame frequency by a switching device 13. The camera units 14 and 15 are connected through cables 16 and 17 with slow motion programmers 18 and 19, and those slow motion programmers are connected through cables 20 and 21 with an RAM recorder 22. On the other hand, the camera units 14 and 15 are directly connected through cables 16' and 17' with the RAM recorder 22. The RAM recorder 22 is used as a recording and reproducing device for recording and reproducing video signals generated by the camera units 14 and 15 as digital signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to at least one camera unit for generating a video signal, at least one recording / reproducing device adapted to said generated video signal, And at least one slow motion programmer for controlling the recording / reproducing device.

[0002] This type of camera unit can be, for example, a camera head (stand-alone) or a camera head with a base station.

[0003]

2. Description of the Prior Art Devices of this type are known. They are advantageously used in so-called television broadcast vans which can transmit sports events such as soccer games or tennis tournaments online. With the camera unit used for this purpose, the events are, for example, filmed on site, recorded and transmitted live to the viewer. At that time, the camera unit operates at a frame frequency of 50 Hz defined in the television standard. Thus, in this type of operation, the event is recorded permanently, but the slow motion recording for a given scene can only be played and transmitted from the complete tape after the event has ended.

[0004] However, in general, when transmitting a predetermined event using a relay van, a plurality of camera units operating at a standard frame frequency of 50 Hz are used as unique slow motion camera units. It is customary to provide each slow motion camera unit with a corresponding, matched magnetic tape recording and reproducing device (MAZ).
Has been assigned. Using a slow motion camera unit of this type, a predetermined image scene, for example a goal scene, can be played back to a television viewer in slow motion during a match. The operator then presses a key on the operating device at the start of a given image scene to set a time mark. At the end of this scene, another key press causes the magnetic tape device to rewind to a position several seconds before the set time mark. This makes it possible to reproduce an image starting with a predetermined scene at the time of the next slow motion reproduction of the recorded scene. When using a magnetic tape device of this type, it is inconvenient for several seconds to elapse before traveling to the start position due to rewinding of the magnetic tape. These seconds are not available for slow motion playback. However, in these few seconds, a magnetic tape device that is blocked by the rewind process cannot record another interesting scene directly following a given scene for slow motion playback.

For quick movements, for example tennis games, the conventional slow motion technology operating at a standard frame frequency of 50 Hz is not sufficient. Therefore, a unique slow motion device is used to provide television viewers with shooting in extreme slow motion. This device increases the motion resolution limited by the television transmission standard and is not bound by the television transmission standard. The camera unit of this type of slow motion device operates at a frame frequency of 150 Hz, and therefore it is significantly higher than the 50 Hz frame frequency specified in television transmission standards. The high-resolution video signal generated by a unique camera unit of this type, as before, also reaches the recording and playback magnetic tape device, but this is not possible with a unique camera unit having a frame frequency of 150 Hz. Must be consistent. With this magnetic tape device, the high-resolution video signal generated by the camera unit is recorded, and the recorded video signal is reproduced in slow motion with a time lag therefrom. Specific slow-motion devices of this type are known as so-called super slow-motion devices and, because they are very expensive and cumbersome, customary vans have a plurality of conventional slow-motion camera units in addition to , Only used in simple configurations.

[0006] From US Pat. No. 4,683,002 a slow motion television system with a plurality of cameras and a memory element assigned to the cameras is known. With this type of structure, the stored data cannot be accessed immediately.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus of the type described at the outset which reduces costs, for example by reducing the number of components, while simultaneously recording and transmitting in slow-motion or super-slow-motion technology. Is to make it possible.

[0008]

According to the present invention, the camera unit switches the frame frequency from a frame frequency corresponding to a television standard to a frame frequency increased for the television standard. And a RAM recorder as the recording / reproducing device, the RAM recorder recording and reproducing a video signal generated by the camera unit as a digital signal. Solved by

As mentioned above, this type of camera unit can be, for example, a camera head (stand-alone) or a camera head having a base station. The switching device of the present invention can be arranged, for example, in a camera head or a base station.

Since the camera unit has a device for switching the frame frequency, only one type of camera unit is required for both normal television recording and slow motion recording in super slow motion technology. This has the advantage of not being done.
This is particularly advantageous for spatially restricted television broadcast vans. Therefore, depending on the application, it can be used as a conventional camera unit for transmitting a standard television signal or as a slow motion camera unit for transmitting a nonstandard video signal. This saves the otherwise required space for the specific slow-motion camera unit described above with its associated amplifier path and monitoring platform.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The provision of a RAM recorder instead of a magnetic tape device as a recording and playback device now provides television viewers with a time loss of slow motion playback in "super slow motion" quality. Another advantage arises that it can be provided online without any. High resolution video signal data continuously written to disk memory is a virtual file that can be immediately read by selection using a slow motion programmer in the form of non-linear editing and transmitted as a slow motion image Can be considered. Another advantage is that image scenes are not lost during slow motion playback.
Because no rewinding is required.

In an embodiment of the present invention, the RAM recorder is a disk memory having a plurality of channels, each of which can be assigned to a separate camera unit.
This has the advantage that for a plurality of camera units it is now only necessary to provide a single recording / reproducing device in which each channel is assigned to a respective camera unit. This results in significant space savings over devices that require separate magnetic tape recording devices to be assigned to each camera unit. This is a particular advantage in a tele van. The reason for this is that a plurality of slow motion devices are always installed in this type of spatially restricted television broadcast van for transmitting sporting events.

Thus, according to the invention, the camera unit used can operate at the frame frequency specified in the television standard or, after switching, is required for super slow motion operation, eg 150 Hz The advantage is that all camera units can switch to a single recording and playback device at the same time. This allows, for example, the transmission of a large sporting event to activate a certain number of camera units at the frame frequency specified in the television standard, while allowing another number of cameras to exhibit extreme slow motion to the television viewer. Can be switched to an increased frame frequency in order to be able to provide the shooting at. Thus, due to the switching capability on the one hand and the use of only one recording / reproducing device for all camera units, a large number of special cameras with super slow motion capability, which have hitherto been customary, with a matched magnetic tape recording device. Is unnecessary.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 1 shows a base station 1 connected to a camera head via a camera head 10 and a cable 11.
A camera unit with 2 is shown. The camera head 10 includes a switching device 13 for switching from a frame frequency of, for example, 50 Hz defined in the television standard to an increased frame frequency of, for example, 150 Hz for super slow motion recording.

FIG. 2 shows a signal sequence for a standard frame frequency of 50 Hz, and FIG. 3 shows a signal sequence for slow motion having a frame frequency of 150 Hz.

FIG. 4 shows two camera units 14, 1
5 are shown, the camera units are switched by a switching device 13 from a standard frame frequency of 50 Hz to 150 Hz.
It is possible to switch to an increased frame frequency. The camera units 14 and 15 are connected on the one hand via cables 16 and 17 with so-called slow motion programmers 18 and 19.
Are connected to the RAM recorder 2 via cables 20 and 21.
2 are connected. On the other hand, the camera unit 1
Cables 16 ', 1 between the RAM recorder 22,
There is a direct connection via 7 '. RAM recorder 22
It is used as a recording / reproducing device for recording and reproducing video signals generated by the camera units 14 and 15 as digital signals. In slow motion operation, the high resolution video signals generated by camera units 14 and 15 reach a RAM recorder 22 controlled by slow motion programmers 18 and 19. The high resolution video signal input to the RAM recorder 22 is transmitted to channels 23, 24, which are schematically illustrated by selection using slow motion programmers 18, 19.
And as schematically indicated by 25,
It is immediately read out again and transmitted as a slow motion image.

FIG. 5 schematically shows a OB van 26, which incorporates, for example, a base station 12, slow motion programmers 18, 19, and a RAM recorder 22 inside, and outside the OB van 26. It has a camera head 10.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a switchable camera unit.

FIG. 2 is a diagram of a signal sequence having a standard frame frequency.

FIG. 3 is a diagram of a signal sequence having a frequency different from a standard frame frequency.

FIG. 4 is a schematic diagram of a video signal photographing and reproducing apparatus having two camera units and an associated RAM magnetic disk recorder.

FIG. 5 is a schematic diagram of a broadcast van accommodating the device shown in FIGS. 1 and 3.

[Explanation of symbols]

10, 14, 15 camera unit, 13 switching device, 12 base station, 18, 19 slow motion
Programmer, 22 RAM recorder, 26 broadcast truck

Continued on the front page (72) Inventor Wilfried Wust Germany Fischbacher-le-Steinau Hauptstrasse 80a

Claims (4)

[Claims] 1. At least one camera unit (10, 12; 14, 15) for generating a video signal;
At least one matched to the generated video signal
One recording / reproducing device (22) and at least one slow motion programmer (1) for controlling said recording / reproducing device (22) during slow motion operation.
8, 19), wherein the camera unit (10, 12; 14,
An apparatus (13) for switching a frame frequency from a frame frequency corresponding to a television standard to a frame frequency increased for the television standard.
And a RAM recorder (22) is provided as the recording / reproducing device (22).
The recorder is the camera unit (10, 12; 14, 1).
5. A video signal recording and reproducing apparatus for recording and reproducing the video signal generated by 5) as a digital signal. 2. The RAM recorder according to claim 1, wherein the RAM recorder is a disk memory with a plurality of channels, each of which can be assigned to a separate camera unit. Video signal recording and reproducing device. 3. The recording and reproducing apparatus according to claim 1, wherein said switching device is used for switching a frame frequency from a frame frequency defined in a television standard of 50 Hz to a frame frequency of 150 Hz. apparatus. 4. The recording and reproducing apparatus according to claim 1, wherein the recording and reproducing apparatus is used for a television broadcast van.